Pump mechanism



l E- R-.GRADHE PUMP MECHANISM Filed May 6, 1951 Juiy 2,

6 I 'P GE 63 'ze war@ cfmv "qmw MLINVENTQR Y E N R O n 5 UNITED-STTES x `struction and combinationV of parts, tofbe more `:fully described .hereinaiter`, and the novelty :of

Patented July 2, 1935 come 2,007,140nl n* yPUMP MECHANISM Erie Regner Gmane, Detrtit,"1wicli.,assgndr to. Detroit Lubrcator CompanypDetroitplVIich.,a

cerporation'ofMichigan -A i' 1 Application Mays, 1931,`ssria1fNp.535,535 f.

` 19 claims; (CI. naaf-30)" My invention relates to new andguseful improve? ymentsin pump operating mechanism, and more particularly to an automatically actuated pump such asis employed for feeding liquid lubricant `underpressure to machine parts Vto be lubricated.

Anobject of my `invention is to provide a pump A;Anotherfobject is to provide means to cushion Vor dampen Vovertravel i of 'the pump actuating means.

Another object is to provide inea pump drive `mechanism having a pendulous actuating 4mem- ;ber, a means to maintain the amplitude or stroke Iof the member substantially constant upon changes in the mean position of saidmember..

The invention .consists in the improved ccnwhich will be particularly pointed out and distinctly claimed. v i i.

In the accompanying drawing, to be taken as 1a part of Jthis specification, I have fully vand clearly' illustrated a preferred embodiment of` my invention, in` which drawing- 1 Figure i is a top plan view of an oiler orlubri- .lcator'embodying my invention, and havingcerr- :tain parts broken away and substantially half of Ithe tcpwall or cover member removed to show the AVinternal construction; 1

Fig.4 2 is a view insection on the line 2-2 of Fig.

rl, showing certain parts broken away for clarity;

'Fig 3 is 'a detail view substantially on the line Fig. 4, is a detail sectional View on the` line lofvFig. 2. Y

f' Referring `to `the drawing by charactersof refierencel Ldesign'ates a tankY or container, which is xmember l removably secured to the vertical walls by studs and nuts il, or the like. .Substantially `central cf the cover member and hinged to thev topiace thereof, is a ller opening cap member 9. A strainer plate Iii vis preferably positioned across the filler opening I I. Extending between and ad jacent the upper edges of the iront and rear walls 3, 4 and substantially eduidistant from the side walls 5, 5, are substantially horizontal, parallel shafts I2`, I3 which are journaled at their ends inv .axially alined bores or sockets I4 provided in bearinglplugs orsleeve members I5 threaded cr otherwise secured in alined apertures I6 in the :front y and rear4 walls. The shafts vI2 and I3 are prefer- -ably polygonal in cross-section intermediate their x15 endsand have secured thereon, preferably .lay :a Apress fit, pendulonsfweighted actuating members Il, t8, respectively; which .are Arelatively offset .scmewhatlon-gitudinally nfshafts I2, I3 for :the Y fsakeofcompactnessl. The members I1 and I-B are l0 similar, andrther'efore aldescription of one-will 'suffice orlboth, .the primes'o'f YtheV reference characters applied 'to vmember I 8 .designating like parts loffmem-ber 11.5- The member I 8- has -at its upper fenda sleeveportion 19, `the bore of which coniis 'formsr-to andreceives'thashaft I3, and on--porltion 'IB are oppositely positioned,V lateral bosses 2D, 21, Y Afor a purpose Yto yfbe described. Dependingy `from `portion t9 iandsecured thereto by interposed and preferably integralfandrelatively perpendicular 2b fwebs 22, :is'a substantiallycylindrical v'weight element l23 having its axis parallel to shaft I3,- and havingat'its owermo'sti'point a depending stop `-orabu-tr-nent member hzllvcooperable with fixed stops25,f26 rising fronrthefbottom walll2 and 25 `spaced!tofdeterminef-the' maximum permissible fswing'orlstrekefof the member- I8. The element 23 lpreferably has its frontiace undercut or `reicessedfto a vertical'plane 2l, so that `the forward fportioncffelement 23 terminates downward in va 30 substantiallyy horizontal. shoulder 28 to provide clearan'ceforcertain meansto be described. Offst laterally from-the vertic'al'center line of memfber I8 is asubstantially rectangular slot 29 which lis inclined slightly toward said lcenter line in a 35 plane-'transverse to shaft I3,and which is open 'at Vits lipperend; Vand which opens at its bottom end 'through thashoulder 2li.` Thefslot 29 is `alined with'the boss 20, and slidably fitting in said `slot Ais a {stop J'orwedge :member 30j; the lower end of im which projects belowthe shoulder A2 8 and has upjwardlyfinclined'divergingA side faces 3 I Substantiallycenterd inthe top portion of member 3 .IJ is a longitudinallyextending, upwardly vopen bore `32 Vinwhch isadjustably threaded thelower end y:ofanYadjustment rod 33' having external righthand's'crewthreads 34, The rod 33"extends up- Vward"thrc'ughfan aperture '35 in the boss 2li, being adjustabl'y theadedt'herein, ,preferably by leftnandfscrew threads" se, -sjo that fmember 3u `win 50 *havedouble*theflongitudinalmovement .of Q rod .33. Int'erx'nediatel its vends the rod `33. has Iflat, substanf tially parallelafces 31 which cooperate witha spring-pressed 'plunger crpavvl 38, reciprocably :mountedin a boss 3.9"onfone ofthe webs 22, and 55 cut-out portion or recess 44 in the rear face of` member 43, and are preferably each formed surfaces diverging from a horizontal'plane, so as to provide substantially a line. or knife-edge contact with the faces 3l. Positioned substantially centrally of wall 2 is a bearing block member 45, in a horizontal bore of which is reciprocably supported and guided one end of member 43. The other end 46 of member 43 which Vserves as a piston, has a slidingflt in a sleeve member 41 having internal, longitudinally extending grooves or passages 48 which open into the tank, so that the chamber 49 within the sleeve, together with the piston 46, comprises an oil filled dash-pot or cushioning means providing an inert means for holding the bar 43 in normal iixedposition and for absorbing or taking up increased kinetic energy of the'weighted member. The sleeve member 41 is fixed in a substantially horizontal bore through a boss 58 and the tank side wall, the boss being preferably integral with the side and bottom tank walls. The outer open end of the chamber 49 is closed and sealed by a plug member 5I which may be threaded into the chamber bore.y The wedge member 30' cooperates with a dash-pot structure similar to that described, andtherefore like parts are designated by the primes of thel reference characters applied to the described struc- Iture. It may be noted that the rod or bar member 43 is positioned rearwardly of member 43 and is supported in a second bore lin the block kmember 45.

Between the weighted actuating members and the front wall 3 are substantially similar-pump 'I'he means 62 prefmeans or mechanisms 52, 63. erably comprises a member or housing substantially of block form having parallel vertical pump chamber bores 54 extending therethrough and which are on opposite sides of shaft I2 andsub- `stantially equidistant laterally therefrom in a plane parallel to wall 3. In the bores 54 are slidably fitted for longitudinal reciprocation, pump plungers 55 having circumferential oil grooves, and which extend upwardly to the top plane of sha-ft I2 and have horizontal notches or recesses 56 in their rear sides. Projecting laterally from the shaft I2 are rigid arms 51 which seat in the recesses 56, so that oscillation of shaft I2 will reciprocate the plungers 55. The arms 51 preferably comprise the end portions of a bar 58 which extends through and is held in a transverse horizontal aperture in the shaft I2 by avlocking pin 59. larged to form a pump chamber 68 and also pro- -vides clearance around the lower pump end of its plunger 55. The bottoms of the chambers 68 are defined` by a further enlargement of bores 54 Yto provide in each a downward facing, annular shoulder 6I against which is seated a check valve retainer sleeve 62 held in position by a ring nut 63 threaded into the bore 54. In each sleeve 62 L is a double valve means 64, preferably ball checks,

which controls the inlet vto the pump chamber.

,Ihe bottom ends of the bores 54 are closed and vsealed by plug members 66. Opening into the Substantially midway, each bore 54 is eni bores 54 between rings 63 and plugs 65 are branch passages 66 from a common inlet passage 61 (Fig. 4), the passage 61 opening vertically downward through a depending cylindrical member 68 which ts in but terminates short of the bottom of a vertical bore 69 in a boss 10 rising from the Wall 2. Positioned and supported by and between the boss 10 and wall 5, is a strainer means 1 I, preferably comprising a horizontalsupportng tube or conduit member 12 fitting at one end in a port or .passage 'I3 in the boss 10, the port opening into bore 69 below member 68. The other end of member 12 is supported in a plug member 14 threaded into and closing an aperture in the tank side wall. On the member 12 is a helical supporting means 15, preferably a coil spring, positioned between annular end plates 16, to the peripheries of which are secured and sealed the ends of a cylindrical strainer or filter element 11, preferably a screen of fine wire mesh, the element 11 being of a diameter less than plug 14, so that the means 1I may be removed through the plugged wall aperture. Through the wall of member 12 are inlet ports or apertures 18 for ingress ofliquid lubricant from the tank. An outlet passage 19 leads from each pump chamber 68 and has positioned therein a check valve retaining sleeve 88 held in place by a ring nut 8 I, said sleeve containing a double valve means 82, preferably ball checks, controlling the outlet passage. On the front face of member 52 are outlet fittings 83 which are internally threaded to receive the externally threaded inner ends ofY clamping sleeve members 84 having flanges 85 to abut the outside face of wall 3, so that the member 52 may be rigidly supported by the wall 3 when members 84 are drawn up tightly. 'I'he bore of each of the membersV 84 is'preferably provided with a control valve 84a, such as a spring loaded ball check, opening automatically to permit feed from the tank. Piping or conduit means, not shown, may be connected to nipples 86 on the sleeve members 84 for conveying the lubricant to the point of application.

Through the tank cover or top wall 1 are apertures V81, 88 which aline vertically with the bosses 20', 2| so that the adjustment screw 33 is accessible through aperture 81. The aperture 88 is of sufficient area for manual operation of the shaft I2 by means of a bent lever 89 normally carried by a bracket 90 on the rear tank wall, and which mayv be inserted through aperture 88 and seated in a socket 9I in the boss 2l', so that manual oscillation of lever 89 will rock or oscillate the member I1 to which it is applied andY drive its pump means. A cover'plate 92 swivelled on a screw 84 is provided for each of the pairs of apertures 81,

A pet cock 93 at the top of side wall 6 is employed as an indicator that the tank is full. The elements of mechanism 53 are designated by the primes of the reference characters applied to mechanism 52.

The operation of my apparatus is as follows: The tank I is mounted on the locomotive to be lubricated, with the shafts I2, I3 substantially parallel to the longitudinal center line of the locomotive near the front or rear end thereof and at suilicient height to receive the lateral sway of the locomotive in motion. The outlet nipples 86, 86' are connected by suitable piping (not shown) to the point of application of the lubricant, and the tank I is filled to the level of the pet cock 93. The rate of feed of the pump means is regulated or controlled by the wedge members 38, 38 which are adjusted by their respective ad- 2,007,140 'Justmcnt screws 33, 33' to permit the desired fmaximun'iV stroke of the members "lill,v i3 `rdetery of the track andthe speed ofthe locomotive, and

whichfwill be Vincreased on entering 'alcurve or on an increme inspeed. '.This'swaying androcking motion/Will be Vimparted "to the pendulous weighted members l1 'and I8 which will swing from side to side between 'the pairsof abut- .i ments 42; and 152, respectively, substantially in Vtime vwith` the impulsesof the lo'cornotive.,` The swinging or oscillation of `members I "-l and 18 -will oscillate their respective vsupporting shafts l2, 513, *causing substantially" vertical simultaneous rise of one and fall ofthe other ofithe arms 56 on shaft I2. and arms 56 onshaftli, so that one `pump'plunger 55 will move through its suction stroke' as the otherplunger `55 moves through itsdischarge stroke, and so'likewise of plungers 55. Should the swaying rof the locomotive increase without changing 'the position of the normal mean positions .of themembers 11, I8, whicharethe positions in which they -hang when the locomotive is at rest on straight track and level rails, the facesSl YQfmember I8 will alternately strike against the abutments 42,but the impacts will be cushioned by the dash-pot -piston 46 drawing in and forcing Vout oil from ,chamberA 4 9 through passages 68, and a similar Vcushioning'. action will take 'place with respect to *member l1. Thus, the' stroke ofthe pumps will be increased slightly, the strokeincreasing as theengine speed increases up to the time when .the abutrnents 42,' 42V 'come into `play to ,limit swinging movement of members 'l1` and "|78, When the locomotive" enters a curve, or if for .any other reason'the mean position ofthe members I l `.andLJiBis changed,` the dash-',-potsV will dampen overtravel orjexcess svvingofl their respective members il' and IBv 4and at the same time permit4 relocation ofthe mean vpositions.

Considering ,the member I8 and assuming that theI meanposition has shifted to theright facing Fig. 2, .andai/though the `rocking and swaying of the .locomotive will' .have been increased, the

pistoni will 'gradually rnovejto` the` right VVor into sleeve vlll, but the piston movementivvill normally `be byunbalanced reciprocationsthereof vdueto the excess kinetic energy of the .swing `of member ...i8 toward the-,right which willf be `cushioned by `the dash-pot means, so that the :abutments 42 will be gradually V`and, intermittently shifted to-V ward Athe right rthus Vserving to -maintain`f the stroke of memberfiv substantially constant as.

the` new meanposition is takenup, .Asthe .bar member. 43 comesinto its newv position, with the iabutments `l2A spaced I substantially equidistant k:from theV new ,mean position, the dash-pot will matic operation bythe pendulous members l1 and '18,1 andthis'is accomplished by manual operation `with the lever 88.

It :will thus be seen that Ihave `providedran :automatically .actuated oiler .or liquid feeding means which is operable to maintainthe delivery substantiallywithin'desired maximum limits, Airrespective of variations inthe'impelling force.

It is fiu'therto benoted that myapparatus provides for an automatically increased delivery of lubricant to` the point of .application at -the times when an increase" is desirable, namely, upon high speed and on curves, and also regulates the rate of feed to a minimum on straight track `at low speeds. j What I claim and desire to secure by Letters Patentl of the United States is:-

' atively connected `tov and for actuating said pump means upon movement of said weighted member,

shiftablev means .normally acting to limit movement of said weighted member, and means to `cushion said shiftable means against the impact of said Weighted'member, `said cushioning means acting to absorb the excess kinetic energy of aV change Vin the'rrneanY position of said weighted member, said `weighted member acting lto shift the .position of said shiftable means `upon predetermined change inthe `mean position of `said 'weighted member whereby to maintain the stroke ofsaid 'Weighted member substantially constant. Y 3. `A 'device of the character described, comprising pump.V means, a swingingly supported weighted member operatively connectedto and for actuating said pump means upon oscillation of said weighted member, normally stationary movable means operable to 'limit the actuating stroke of said 4weighted. membensaid movable means moving with said weighted member upon predel termined' change vin the:` meanv position of said weightedmember whereby to maintain the actuating stroke of said Weighted member substantially constant irrespective of changeof the mean position thereof, and means to dampen the movement of said movable means. Y f

4. A device ofA the Vcharacter described,` coniprising pump means for delivery of lubricant 'under. pressure, a swingingly supported weighted member operatively connected to and for actuating said .means upontswinging movement of said `Weighted member, a vmovable abutment member normally held against'movement, and means rigidl with said` weighted member cooperable with fsaid abutment member-'to limit swinging Aimovement of saidweighted member in one direction, 'said abutment member moving with said weighted member upoh'predetermined change in the mean Vposition of 'said weighted member, said abutment member and said'last-named means being relatively adjustable whereby kto regulate `the amplitude of said weighted' member.

l* 5. A device of the character described, comprising pump means for delivery of lubricant under pressure,a swingingly supported weighted member operatively connected to and for actuating said means upon swinging movement of said weighted member due to lateral impulses of the member supporting means, means normally operable to conne the stroke of said Weighted member between predetermined limits, .said lastnamed means being movable upon excessive lateral impulses to increase the limits of swinging movement of said weighted member, and means to dampen themovement of said last-named means. 6. A device of the character described, comprising pump means for delivery of lubricant under pressure, a swingingly supported Weighted member operatively connected to and for actuating said means upon swinging movement of said weighted member due to lateral impulses of the member supporting means,-means normally operable to confine the stroke of said weighted member between predetermined4 limits, said last-named means being movable upon excessive lateral impulses to increase the limits of swinging movement of said weighted member, and dash-pot, means operable to dampen the movement of said last-named means.

'7. A device of the character described, comprising pump means for delivery of lubricant under pressure, a swingingly supported weighted member operatively connected to and for actuating said means upon swinging movement of said weighted member due to lateral impulses of the member supporting means, spacedY abutment members normally operable to conne the stroke of said weighted member between predetermined limits, said abutment members being movable upon excessive lateral impulses to increase the limits ofY .swinging movement of said weighted member, and means to dampen themovement of said abutment members.

8. A device of the character described, comprising pump means for delivery of lubricant under pressure, a swingingly supported weighted member operatively connected to and for actuating said pump means upon swinging movement of said weighted member, a stop member-carried by said weighted member and having a face inclined .to a vertical plane normal to the plane of movement of said weighted member, and an abutment member cooperable with the inclined face of said stop member to limit the amplitude of said weighted member, said stop member and said abutmentmember being relatively adjustable whereby to regulate the amplitude of said weighted member.

9. A device of the character described, comprising pump means for delivery of lubricant under pressure, a swingingly Supported Weighted member operatively connected to and for actuating said pump means upon swinging movement cf said weighted member, an adjustable stop member carried by said weighted member and having a face inclined to a vertical plane normal to the plane of movement of said weighted member, an abutment member cooperable with the inclined face of said stop member to limit the amplitude of said weighted member, and means to move said stop member relative to said abutment member thereby to regulate the distance at the mean position of said weighted member between said inclined face and said abutment member.

10. A device of the character described, comprising pump means for delivery of lubricant under pressure, a swingingly supported weighted member operatively connected to and for actuating said pump means upon swinging movement of said weighted member, said weighted member having a substantially vertical guide slot therein, a member vertically adjustable in said'slot and projecting from the lower end thereof, the projecting end portion of said adjustable member having upward diverging stop faces normal to the plane-ofswinging movement, and abutment members'cooperable with said stop faces to limit the amplitude of said weighted member.

11; A device of the character described, comprising pump means for deliveryof lubricant under pressure, a swingingly supported weighted member operatively connected to and for actuating said pump-means upon swinging movement of said weighted member, a stop member carried by said-weighted member, a plunger member supported for reciprocation substantially parallel to a tangent to the path of said weighted member at the normal mean position thereof, said plunger member having spaced abutment members cooperable with said stop member to limit the amplitude: ofY said weighted member, and a dash-pot chamber cooperable with said plunger member to resist movement thereof by said weighted member. l

12. A device of the character described, comprising a liquid holding tank, pump means for ldelivery of liquid from said tank, a depending swingingly supported weighted member positioned in said tank and operatively connected to said means to actuate said means upon swinging movement, a plunger kmember having abutment means normally limiting the amplitude of said swinging member, a sleeve member xed in said tank and reciprocably receiving in the bore thereof one end of said plunger member, the bore of said sleeve member being closed at one end to provide therein a dash-pot chamber, and said sleeve member having a longitudinally extending internal groove for passage of liquid between said tank and said chamber whereby said plunger member is movable by said weighted member.

13. A-device of the character described, comprising pump means for delivery of lubricant under pressure, a swingingly supported weighted member operatively connected to and for actuating said means upon swinging movement of said weighted member due to lateral impulses of the member supporting means, spaced abutment members normally operable to confine the stroke ofv said weighted member between predetermined limits, said abutment members being movable by said weighted member upon excessive lateral impulses, adjustable means carried by said weighted member and cooperable with said abutment members to regulate the amplitude of said weighted member, and means to dampen the movement of said abutment members.

14. A device of the character described, comprising pump means, a swingingly supported weighted member operatively connected to and for actuating said pump means upon oscillation of saidw'eighted member, movable means engageable upon movement of said Weighted mem'- be'r and normally acting to limit movement of said weighted member, and means to cushion movement of said limiting means due to the impact of said weighted member thereagalnst.

15. A device of the character described, comprising pump means, a Weighted member operatively connected to and for actuating said pump means, movable means normally acting to confine movement of said weighted member between predetermined limits of'movement, and dash-pot means normally acting to hold said movable means in xed position, said dash-pot means acting upon increased kinetic energy of, said Weighted member to dampen movement of said movable means. v

16. A device of the character described, com--V prising acontainer for liquid, pump means ,for

delivery of liquid from said container, a reciprocable membervoperatvely connected to and for actuating said pump means, a plunger member cooperable with said reciprocable member to limit the stroke thereof, and adash-pot chamber receiving said plunger member and cooperable therewith to cushion the impact of said reciprocable member against said plunger member.

17. A device of the character described, comprising a container for liquid', pump means for delivery of liquid from said container, a reciprocable member operatively connected to 'andF for actuating said pump means, a plunger member cooperable with said reciprocable member to limit the stroke thereof, and a dash-pot chamber receiving said plunger member and cooperable therewith to cushion the impact of said reciprocable member against said plunger member, said dash-pot chamber havingv communication with said container whereby movement of said plunger member is controlled by transfer of liquid between said chamber and said container.

18. A device of the character described, comprising pump means,. a swingingly supported weighted member operatively connected to and forractuating said pump means upon oscillation of said weighted member, and normally station- Weighted member operatively connected to and for actuating said pump means upon oscillation of said weighted member, meansV normally engageable by and operable to regulate the length of stroke of said Weighted member, and substantially inert means operable upon predetermined Achange lin the mean position of said weighted' Vmemberto absorb the increased kinetic energy due to the change in mean position of said weighted member.

ERICRAGNAR GRADHE. 

